A 30 litres milk water mixture contains 50 milk How much pure milk need to be added to this mixture ......

A 30 litres milk-water mixture contains 50% milk. How much pure milk need to be added to this mixture to make the mixture 30% water?

30 litres mixture contains 15 litres of water.
When milk added to this, quantity of water will remain same (i.e. 15 l)
Let x l of pure milk to be added, then
30% of (30+x) = 15
Solve, x = 20 litres

By: Amit Kumar